Abstract: Provided is an audio transmission method between at least two audio communication systems including a transmitting audio communication system with first and second audio transmitting devices and a receiving audio communication system with at least one audio receiving device. The method includes transmitting a first wireless audio stream, via a first wireless audio link, by the first audio transmitting device and a second wireless audio stream, via a second wireless audio link, by the second audio transmitting device; and selecting, by the at least one audio receiving device, one of the first wireless audio stream or the second wireless audio stream based on quality parameters of the first audio link and the second wireless audio link.

Abstract: A microphone assembly includes: at least three microphones for capturing audio signals from the user's voice, the microphones defining a microphone plane; an acceleration sensor for sensing gravitational acceleration in at least two orthogonal dimensions so as to determine a direction of gravity; a beamformer unit for processing the captured audio signals in a manner so as to create a plurality of N acoustic beams, a unit for selecting a subgroup of M acoustic beams from the N the acoustic beams; an audio signal processing unit having M independent channels for producing an output audio signal for each of the M acoustic beams; a unit for estimating the speech quality of the audio signal in each of the channels; and an output unit for selecting the signal of the channel with the highest estimated speech quality as the output signal of the microphone assembly.

Abstract: Provided is an audio transmission method between at least two audio communication systems including a transmitting audio communication system with first and second audio transmitting devices and a receiving audio communication system with at least one audio receiving device. The method includes transmitting a first wireless audio stream, via a first wireless audio link, by the first audio transmitting device and a second wireless audio stream, via a second wireless audio link, by the second audio transmitting device; and selecting, by the at least one audio receiving device, one of the first wireless audio stream or the second wireless audio stream based on quality parameters of the first audio link and the second wireless audio link.

Abstract: A microphone assembly includes: at least three microphones for capturing audio signals from the user's voice, the microphones defining a microphone plane; an acceleration sensor for sensing gravitational acceleration in at least two orthogonal dimensions so as to determine a direction of gravity; a beamformer unit for processing the captured audio signals in a manner so as to create a plurality of N acoustic beams, a unit for selecting a subgroup of M acoustic beams from the N the acoustic beams; an audio signal processing unit having M independent channels for producing an output audio signal for each of the M acoustic beams; a unit for estimating the speech quality of the audio signal in each of the channels; and an output unit for selecting the signal of the channel with the highest estimated speech quality as the output signal of the microphone assembly.

Abstract: Systems, methods and software for sample rate conversion with unknown input and output clocks are disclosed. In one embodiment, a method for an asynchronous transfer of audio data includes: receiving the audio data by an antenna of a receiver (RX); storing the audio data in an input buffer of the RX; and receiving data words from the input buffer by a sample rate converter (SRC). The consecutive data words are received from the input buffer at an adjustable period T. The method further includes tracking a filling level of the input buffer; and based on the filling level of the input buffer, adjusting the adjustable period T. When the filling level of the input buffer is below the target level of the input buffer, the adjustable period T is increased. When the filling level of the input buffer is above the target level of the input buffer, the adjustable period T is decreased.

Abstract: Systems, methods and software for sample rate conversion with unknown input and output clocks are disclosed. In one embodiment, a method for an asynchronous transfer of audio data includes: receiving the audio data by an antenna of a receiver (RX); storing the audio data in an input buffer of the RX; and receiving data words from the input buffer by a sample rate converter (SRC). The consecutive data words are received from the input buffer at an adjustable period T. The method further includes tracking a filling level of the input buffer; and based on the filling level of the input buffer, adjusting the adjustable period T. When the filling level of the input buffer is below the target level of the input buffer, the adjustable period T is increased. When the filling level of the input buffer is above the target level of the input buffer, the adjustable period T is decreased.

Abstract: A hearing assistance system and method for wireless RF audio signal transmission from at least one audio signal source to ear level receivers, wherein a close-to-natural hearing impression is to be achieved. At least one parameter of the RF signal as received from a transmission unit at a respective receiver unit to create left ear RF signal measurement data and right ear RF signal measurement data, respectively. The angular localization of each transmission unit is obtained by comparing, for each transmission unit, the left ear RF signal measurement data and the right ear RF signal measurement data. The audio signals are processed and distributed according to the estimated angular localization of each transmission unit in a manner so that the angular localization impression of the audio signals from each transmission unit as perceived by the user corresponds to the estimated angular localization of the respective transmission unit.

Abstract: A hearing assistance system and method for wireless RF audio signal transmission from at least one audio signal source to ear level receivers, wherein a close-to-natural hearing impression is to be achieved. At least one parameter of the RF signal as received from a transmission unit at a respective receiver unit to create left ear RF signal measurement data and right ear RF signal measurement data, respectively. The angular localization of each transmission unit is obtained by comparing, for each transmission unit, the left ear RF signal measurement data and the right ear RF signal measurement data. The audio signals are processed and distributed according to the estimated angular localization of each transmission unit in a manner so that the angular localization impression of the audio signals from each transmission unit as perceived by the user corresponds to the estimated angular localization of the respective transmission unit.